Home / 28,178.64-42,290.04-12,394.64

Finding the Fourth Proportional to 28,178.64, 42,290.04 and 12,394.64

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Solution

The fourth proportional to 28,178.64, 42,290.04 and 12,394.64 is: 18,601.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,178.64 : 42,290.04 = 12,394.64 : x
  2. Step 2: Convert to fraction form
    28,178.64/42,290.04 = 12,394.64/x
  3. Step 3: Cross multiply
    28,178.64x = 42,290.04 × 12,394.64
  4. Step 4: Simplify right side
    28,178.64x = 524,169,821.39
  5. Step 5: Solve for x
    x = 524,169,821.39/28,178.64
  6. Step 6: Final answer
    x = 18,601.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.